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The Original 3-Across All-in-One Car Seat upgraded edition. All-in-One Car Seat just got better. Updated with 12 improvements from the original Radian 3R, the Diono Radian 3R SafePlus features Diono SafePlus engineering, SafePlus Easy-Adjust 12 Position Headrest and improved SafePlus Side Impact Protection for complete protection from birth to booster (now suitable from 4 – 120 lb.) Lovingly engineered with the improved SafePlus Steel-Core, and as both a rear and forward-facing convertible car seat, the Radian 3R SafePlus protects as they grow, with SafePlus Easy-Adjust 12 Position Headrest. The new and improved Radian 3R SafePlus features energy-absorbing Side Impact Protection and extended side walls to reduce the impact of side crashes, all without affecting our slim fit 3-Across design in most midsize vehicles. The Radian 3R SafePlus comes with Anti-Rebound Bar slots for optional Anti-Rebound Bar (sold seperately) for added rear-facing safety. Radian 3R SafePlus All-in-One Convertible Car Seat is subjected to a combination of the most rigorous crash tests to ensure the safest seat possible. In addition to our regular extensive crash testing, we test over and above – including roll-over and side-impact tests, to achieve results above and beyond the current Federal standards. Our Easy-Click SuperLATCH system (UAS Compatible) makes installation easy and super secure. Radian 3R SafePlus now comes with an XL Steel-Reinforced Cup Holder to keep drinks and snacks handy on the go, and as travel car seat experts, Diono has naturally built-in super portable and convenient features to the Radian 3R SafePlus with travel fold for easy transport and storage and easy remove machine washable covers. The radian is also aircraft certified (FAA approved), so you can take safety with you wherever you go.
10 Years 1 Car Seat – from Birth to Booster (1.8 – 54 kg) it’s all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat!
Rear-Facing for Longer – keep your child rear-facing (up to 22.7 kg) with SafePlus Engineering and high-strength steel anti-rebound bar.
Fits 3-Across – our famous slim-fit design with SafePlus 6-layer side impact protection with zero compromises to safety, space, or comfort.
Mechanically Engineered – reinforced automotive grade high-strength steel, our unique core shell shields and protects your child.
One Hand Easy-Adjust – 12-position headrest with 6 layers of enhanced, rigorously tested, side impact protection.
The Original and Only All-In-One Convertible Car Seat – folds for travel or compact storage and FAA approved for airline use.

Bought another for my next kid
This seat is great. Very heavy but it’s stable and fits perfectly in the car. Very happy it was only $200
Great for Air Travel
We bought these specifically for their narrow size for aeroplane travel with our kids (3, 5).They fold nicely and can sit on top of your luggage. We used a small crank tie to attach it to our carryon as it is awkward and a bit heavy to carry on a long walk through an airport terminal.But it fits nicely in aeroplane seats, they are very quick and easy to install in both cars and planes. The pull strap to secure your child is a lot easier to use than other car seats we have used.These are a bit pricey, but are absolutely worth the cost.
Best car seats in the world!
I have 3 of them! all fit in my car. I love how slim and comfy these are. Easy to install and clean.
Slim design, great car seat
I bought this car seat looking for a slim design that would fit in the backseat of a 1/4 ton truck with a tight backseat. This fits well and is a great size for my 3-year old daughter. Weâve been using it for a couple weeks and after install I have no complaints.Only reason Iâm giving it a 4 is that is was a little tricky to get it tight enough on install. I watched several videos and could not get it tight enough using the latch straps. However using the other option of securing with the seatbelt was easier and is very secure.
Awesome car seat
I bought this car seat as a second to have when we got a second vehicle. However I liked it so much and so did our (rear facing, 21lb, 19 months) daughter that this is now the main car seat, and my husbands truck has the Grace Forever. Not that there is anything wrong with the graco, itâs just she looks so much more comfortable in the Diono. Itâs slim and sleek, fun colour, she sleeps very well in it and her head does not hang uncomfortably like in the graco. There is another Diono model with all the cushions and I went back and forth on this one and that, honestly, this one gets the job done well. Maybe if she was an infant I would purchase the one with all the cushions but there is seriously no need. The memory foam on the buckle straps are perfect for protecting the neck from rubbing and give a really nice cushion without preventing proper tightening.I would say that only downside Iâm seeing is in rear facing, itâs a tall seat and it reclines very well so you may have issues in a smaller car or if the seat has to be behind a tall person. We have a Honda Odyssey and it does prevent the front passenger from having ample leg room or any bit of reclining. But thatâs just temporary! I say go for it!
Best for 3 across car seat configuration
This car set is one of my go-to for multiple children. It installs super seamlessly and is easy to uninstall as well. It fits nicely 3 across in vehicles including my small compact Hyundai Accent. It is a piece of cake to take apart and clean without multiple pieces, snaps, and velcro pieces to try to remember. A bonus is the fact it fits from rear-facing right up to high back boosterâthe most affordable price point too on a compact multi-level car seat.
This is the one you want
I need to have an adult sitting between the baby seats every now and then so I go for narrow car seats. I also have the Graco Tranzitions and a Clek Foonf. The Diono is heavy and strong kind of like the Clek, but narrow and minimalist like the Tranzitions. I would only use this seat rear-facing with the anti-rebound bar.I love the Graco Tranzitions, and my Clek, BUT the former is built out of plastic and the latter is very bulky. The Radian seems to have the best of both worlds, although it’s not as light as the Tranzitions and not as sturdy as a Clek.
Amazing saftey
This car seat saved my daughter life I will never go with another car seat
We have two of these carseats now and absolutely love them. They are slim and provide a lot of room for both the child using the carseat and the person sitting next to the car seat. I love how these carseats feel open and not so enclosed for the child.The car seat itself is very easy to install correctly and the cover is easily removable and reattachable for easy cleaning. The padding is great and it feels really secure and has great stability. Overall great quality.The only thing I wish that was different, is i wish these came with at least one cup holder. These are the only carseats I love to use for forward facing kids!
Ocupas ser un Ingeniero Aeronautico o automotriz para Instalarlo. Es demasiado Dificil su instalación. Pero brinda buena protección al BB
Buena calidad, muy seguro y sencillo de instalar
We absolutely love our Diono Radian 3R! It’s been a fantastic car seat for our child, lasting from infancy all the way to booster use. Here’s why it gets 5 stars:Space-Saving Design: This car seat is a dream for tight spaces. Its slim design allows us to fit 3 car seats across our mid-size car, perfect for families with multiple children.Long-Lasting Value: This car seat truly grows with your child. It transitions seamlessly from rear-facing for newborns (up to 50 lbs) to forward-facing (up to 100 lbs) and then to a booster seat (up to 120 lbs). It’s a one-time investment that lasts for years.Comfort & Safety: Our child finds the Radian 3R very comfortable, with breathable fabric and a well-padded design. Plus, Diono’s safety record and features like the steel-reinforced frame give us peace of mind.Easy to Use: Installation with SuperLatch was a breeze, and switching between rear-facing and forward-facing is simple. The harness is easy to adjust and the removable cup holders are a convenient touch.Easy to Clean: The Diono Radian 3R’s machine-washable fabrics make cleaning up spills and messes a breeze.If you’re looking for a convertible car seat that’s safe, space-saving, comfortable, and built to last, the Diono Radian 3R is an excellent choice!
We had a Maxi Cosi car seat, this is MUCH slimmer however seems as secure. The straps are more streamline and easy to use as well. This leaves more room between the front row so my 4 year old has more room for her feet. Highly recommend for a three row car.